just two. the first lady wore a red gown by designer jason wu to the commander in chief ball, the same designer she wore to the first inaugural. >> ladies and gentlemen, my better half and my dance partner, michelle obama. ♪ i, i'm so in love with you >> jennifer hudson wasn't the only one serenading the president and first lady. you had stevie wonder, john legend, and alicia keys among the other performers last night. here's aleasicia keys with a special version of her hit, "girl on fire." ♪ he's the president and he's on fire ♪ ♪ hotter than a fantasy ♪ obama's on fire ♪ obama's on fire >> nbc's peter alexander is live at the white house now. now, peter, i understand you have a song prepared for us. >> reporter: yeah, no, i was just going to perform for you. actually, i'm glad my mic wasn't hot about 45 seconds ago. you know, you were talking about the president speaking about climate change yesterday, the climate change overnight, we're hovering in the low 20s. we're fortunate, or the inaugural planners are, that this thing didn't have to take place about 24 hours later.